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Vanitha, S.
- Efficacy of Bio-Control Agents and Fungicides in Management of Mulberry Wilt Caused by Fusarium solani
Abstract Views :324 |
PDF Views:226
Authors
P. Narayanan
1,
S. Vanitha
1,
J. Rajalakshmi
1,
S. Parthasarathy
1,
K. Arunkumar
1,
K. Nagendran
1,
G. Karthikeyan
1
Affiliations
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore – 641003, Tamil Nadu, IN
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore – 641003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 29, No 2 (2015), Pagination: 107-114Abstract
A study was conducted to know the efficacy of potential biocontrol agents and fungicides against mulberry wilt, Fusarium solani. Three antagonists viz., Trichoderma viride., Pseudomonas fluorescens and Bacillus subtilis and six fungicides viz., carbendazim, mancozeb, zineb, copper oxy chloride, tebuconazole and pre-mixture fungicide (carbendazim 75% + mancozeb 25%) were tested under in vitro and in pot culture against wilt pathogen. The results showed that Trichoderma and the bacterial bioagents significantly reduced the mycelial growth of the pathogen. Among the fungicides, mixture of carbendazim + mancozeb (0.1 %) completely inhibited the mycelial growth of the pathogen. In pot culture studies, the minimum (10.5 %) incidence of wilt was observed in soil drenching with carbendazim (0.1%) which was on par with soil application of consortia (Seri bed waste+Pf1+Bs4+Tv1+Neem cake) which showed 12.3 per cent incidence as compared to maximum (46.7 %) wilt incidence in control. Similarly, in field studies also recorded the minimum incidence in soil drenching with carbendazim (0.1%) followed by soil application with consortia.Keywords
Bioagents, Fungicides, Fusarium solani, Mulberry, Wilt.Full Text
- Strategic Eco-Friendly Management of Post-Harvest Fruit Rot in Papaya Caused by Colletotrichum gloeosporioides
Abstract Views :264 |
PDF Views:127
Authors
Affiliations
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore - 641003, Tamil Nadu, IN
1 Department of Plant Pathology, Centre for Plant Protection Studies, Tamil Nadu Agricultural University, Coimbatore - 641003, Tamil Nadu, IN
Source
Journal of Biological Control, Vol 33, No 3 (2019), Pagination: 225-235Abstract
Papaya (Carica papaya L.) is one of the important fruits cultivated in the tropical and subtropical regions are widely prone to the post-harvest anthracnose disease. A sum of ten isolates of Colletotrichum gloeosporioides were collected and identified through morphological and molecular method. Morphological characterization of the isolates revealed a wide variation among the isolates with respect to colony colour, topography, margin, pigmentation and zonation. The ITS gene region and the specific primer, MKCgF coupled with ITS-4, which generated amplicons of size 560 bp and 380 bp respectively for C. gloeosporioides. The amplicon (560 bp) of virulent strain Cg1 was partially sequenced [MF062699]. In order to formulate eco-friendly management practices, the in vitro screening of different biocontrol agents viz., Bacillus spp., Pseudomonas spp., plant extracts and essential oils were tested against the C. gloeosporioides. Based on the in vitro efficacy, Bacillus sp. (BSP1) and cinnamon oil were selected and further tested under field conditions as pre harvest spray and after harvest as fruit dipping. The experimental results revealed that pre-harvest spray with Bacillus sp. (BSP1) (5%) + post-harvest dipping with cinnamon oil (0.1%) recorded the lowest PDI of 3.25 when compared to control (70.36) and also increased the shelf life of papaya fruits up to 14 days. Our results show that this novel methodology of use a combination of biocontrol agent as pre-harvest spray and essential oils as post-harvest fruit dipping will protect against post-harvest anthracnose of papaya and use of chemical fungicides can be avoided.
Keywords
Anthracnose, Bacillu spp, Colletotrichum gloeosporioides, Cinnamon Oil, Formulation, Thyme Oil.Full Text
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